Questions: A thin sample of X is put between metal plates. A radio-frequency electric current is applied to the plates and passes through the sample. From the measured voltage across the plates the value of E may be calculated.

The question seems to be asking whether the described scenario is related to a physical or chemical process.

The scenario involves a thin sample of material $X$ placed between metal plates, with a radio-frequency electric current applied. The voltage across the plates is measured to calculate the electric field (E). This setup is typically used to study the electrical properties of materials, such as conductivity, permittivity, or impedance, which are physical properties.

The answer is: physical.

Explanation:

• The process described involves measuring the electrical response of a material to an applied electric field, which is a physical property. It does not involve any chemical reactions or changes in the chemical composition of the material.
• The calculation of the electric field (E) from the measured voltage is a typical procedure in the study of the physical properties of materials, such as dielectric properties or conductivity.
• There is no indication of any chemical processes, such as reactions or changes in chemical structure, occurring in the scenario described.

In summary, the scenario is related to the physical properties of the material, not chemical properties.